History of main 2 changes

In crates/hub/build.rs, lines 4–22 on 1b6536f06132197240c848a7d44e24e80afc37394e0d66fd37fb08427fe10ce3. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 4,22:crates/hub/build.rs.